One dog was a German Shepherd and the other was a poodle.The  
OPTIONS:
- german shepherd was a big dog.
- poodle was a big dog.
german shepherd was a big dog.

The animator Natalie was mentoring Samantha in the craft, since 
OPTIONS:
- Natalie had so much experience to share.
- Samantha had so much experience to share.
Natalie had so much experience to share.

While taking his medication, John had to cut the red pill in half, but he could swallow the blue pill whole, because the 
OPTIONS:
- red pill was very large.
- blue pill was very large.

red pill was very large.